What is fifty-eight plus ninety-eight minus twenty-three

How do you add/subtract radical operations? I know how to simply and stuff, but how do you do things like 4 square root of 2 plus 7 square root of 4?

A bridge is built in the shape of a semielliptical arch. It has a span of 112 feet. The height of the arch 26 feet from the center is to be 12 feet. Find the height of the arch at its center.

Two-thirds of the students in Hannah's homeroom plan to do some volunteering this summer. Of these students, 3/5 plan to volunteer at the community center.

The principal P is borrowed at a simple interest rater for a period of time t. Find the simple interest owed for the use P - $830, r-3%, t - 2 years

A statistics student at a small liberal arts college who is curious about the relationship between the amount of time students at his college spend on social networking sites and their performance at school decides to conduct a survey.

Adam's father spent 1 hour and 50 minutes working on his truck. If it was 7:35 when he stopped working, what time was it when he originally started?

If Sara could type 90 words a minute about how many words could she type in 10 mins

On a trip from virginia to florida the sampson family wants to travel at least 420 miles in 8 hours of driving what must be their average rate of speed

Rapunzel cut 2/3 of of her hair. She donated 7/8 of what she cut off to a wig shop. What fraction of her hair did Rapunzel donate?

What is 6.4 divided into 52.032